Office of Extramural Research
Officer Evaluation Report
Office of Exploratory Research
Oxygen Enhancement Ratio
Office of Energy Research
Open Educational Resources
Operating Expense Ratio
Optimized Edge Routing
oestrogen receptor
Office of Emergency Response
Office of Employee Relations
Office of Environmental Restoration
Office of External Relations
Officer Effectiveness Report
Officer Efficiency Report
Officer Evaluation Reports
Open Education Resource
operating experience report
Operation Expense Ratio
Operational ELINT Requirements
Operational Equipment Requirement
Optical and Electronic Research
Oracle Enterprise Repository
Organizational Efficiency Review
osmotic erythrocyte
oxygen enhancement ratios
Oxygen Evolution Reaction
oxygen extraction
oxygen extraction ratio
Open Educational Resource